Update shellv2 other-stream output format with blue username tag

[KCarretto]

This change updates the shellv2 output format when displaying commands executed by other users in the same shell session.

Previously, the output was formatted as [+] [<USER_NAME>] Task Output for <TRUNCATED_COMMAND>.

The new format is [@<USER_NAME>][+] <COMMAND>, where [@<USER_NAME>] is colored blue using ANSI escape codes (\x1b[34m). This improves visibility and distinguishes commands run by others. The command is also no longer truncated in the header, ensuring the full context is visible.

Verification:

• Ran go test -v tavern/internal/http/shell/integration_test.go -run TestOtherStreamOutput which passed.

---

PR created automatically by Jules for task 1952170298998639824 started by @KCarretto

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[github-actions]

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
2659    ±0	2659    ±0	0    ±0	0    ±0	0    ±0	0    ±0	1ms    ±0

Previous Results

Build 🏗️	Result 🧪	Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
#1230	✅	2659	2659	0	0	0	0	37.2s

Insights

Average Tests per Run	Total Flaky Tests	Total Failed	Slowest Test (p95)
2659	0	0	6.1s

Slowest Tests

Test 📝	Results 📊	Duration (avg) ⏱️	Duration (p95) ⏱️
TestDockerExecutor_Build_ContextCancellation	1	6.1s	6.1s
eldritch-libsys: std::dll_inject_impl::tests::test_dll_inject_simple	1	5.1s	5.1s
TestInteractiveShell	1	5.0s	5.0s
TestOtherStreamOutput	1	5.0s	5.0s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
TestDockerExecutor_Build_SimpleEcho	1	4.3s	4.3s
imix::bin/imix: tests::task_tests::test_task_streaming_output	3	3.0s	3.1s
imix::bin/imix: tests::task_tests::test_task_streaming_output	3	3.0s	3.1s

_{🎉 No failed tests in this run. | 🍂 No flaky tests in this run.}

Github Test Reporter by CTRF 💚

🔄 This comment has been updated

[KCarretto]

Will need to push to a multi-user env to do further testing but it still works

[google-labs-jules]

Will need to push to a multi-user env to do further testing but it still works

Acknowledged. The screenshot confirms that basic functionality for the current user is preserved (Task Queued -> Output). The changes I made specifically target the format of other users' tasks, which you mentioned will require a multi-user environment to test further. I have verified this behavior with the TestOtherStreamOutput and TestOtherStreamOutput_Polling integration tests.